Paralysis

loss of muscle function in one or more muscles

Paralysis is the complete loss of muscle function for one or more muscle groups, when the thing that is paralysed cannot move.

Paralysis is most often caused by damage to the nervous system or brain, especially the spinal cord. Major causes are stroke, trauma, poliomyelitis, amyotrophic lateral sclerosis (ALS), botulism, spina bifida, multiple sclerosis, and Guillain-Barré syndrome. Partial paralysis can also occur in the REM stage of sleep (see:Sleep paralysis). Paralysis often includes loss of feeling in the affected area.

Types of paralysis

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Hemiplegia

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In hemiplegia, one side of the person's body is paralysed.

Monoplegia

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During monoplegia, only one limb is unable to move.

Paraplegia

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In paraplegia, both legs are unable to move. The person is paralyzed from the waist down.

Quadriplegia

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The most extreme form of paralysis. The whole body from the neck down can't move.

Locked-in syndrome

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Paralysis of the whole body.